Goldsbuby h



' (No Model.) 7

G. H. POND.

- HYDRAULIC ELEVATOR.

I Patented May'Q, 1882.

NOQ 257,754.

O '1' n a I z r e 2 f1 1 UNITED STATES PATENT OFFICE.

GOLDSBUBY I-I. POND, OF NEW YORK, N. Y.

HYDRAULIC ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 257,754, dated May 9, 1882.

Application filed April 14, 1882. (No model.)

To all whom it may concern: V Beit known that], GOLDSBURY H. POND,

a citizen of the United States, and resident of the city, county, and State of New York, have invented certain new and useful linprovements in Hydraulic Elevators, of which the following is a specification. I

My invention relates to that class of elevating apparatus in which a 'pistop is caused to traverse the cylinder by the action of steam under pressure upon a body ofwater; and my invention consists in appliances, constructed and arranged as fully described hereinafter, to insure the proper and simple action of the regulating-valves, maintain the motor fluid at a proper uniform temperature, and prevent the overcharging of the steam and water chamber.

. In the drawings, Figure l is a part'sectioual elevation, showing a cylinder and piston, steam and water chamber and pipes, valves, and operating appliances of my improved elevator; and Fig. 2 is an elevation showing the improvement in connection with a horizontal cylinder.

.A is the cylinder, which may be vertical, as in Fig. 1, or horizontal,asi1rFig. 2, andisprovided with the usual piston. and piston-rod and appliances connecting the same to the-cage or platform; and B is an airtight tank, which communicates through a pipe, a, with the cylinder A, near one end ofthe piston. The upper end of the tank B is contracted, and to the same is connected the casing hot the valve 0, which controls theflow of steam from the pipe d, which communicates with a steam-generator. Below the case b' is a second valve-case, f, provided with a valve, 6, and comm uuicating with the tank and with an exhaust-pipe,g. In the pipe a is a. \-'alve-casing, l1-, having avalve, 6, opening upward. The stems of the difi'erent valves are connected respectively to weighted levers is I m, soarranged that the ends of the levers shall be in the samevertical plane with two rods or cables, D D, extending through eyes or slots in the levers and through or adjacent to the cage.

Upon the rod D are two tappets,pp, and

' upon the rod D are two ta ppets, q q, which are so arranged that on elevatiu g the rod D the tappetp' will strike the lever on and elevate the latter and its valve 1', affording a free communication between the tank and the cylinder A through the pipe a, after which the further movements of the rod will bring the tappet 17 against the lever is and elevate the latter and the valve 0, permitting the steam to flow upon the surface of the body of water contained in the tank and filling the pipe a and. the end of the cylinder with which the pipe connects. The pressure of the steam forces the water into the cylinder, thus imparting movement to the piston and to the cage.

The cage may be arrested by lowering the rod 1), thereby first closing the steam-valve c and then the valve 1 To lower the cage the rod D is elevated, thereby first opening the eXhaust-valve'e to permit the escape of steam from the tank, after which the tappet q is brought against the lever m, thereby opening the valve "6 and permitting the water to pass from the cylinder through the pipe at back into the tank B.

By first opening the valve ?3 and then the steam-valve I prevent the suddenmovements and by first opening the exhaust before rais' ing the valve i, I secure the discharge of the steam from the tank, so as to avoid any possi; ble reaction from its expansion upon raising the valve i.

The water in the tank may be heated to prevent the condensation of the steam; but as a general thing no appliances are required for this purpose, as the steam would in most instances soon heatthe water to such an extent as would interfere with the operation of the apparatus. To prevent this I introduce a coldwater pipe, I, into the tank B, and pass cold water through the same in such quantites as to maintain the waterin the tank at about the temperature of 200, which is sufficient to prevent any material condensation of the steam, and will prevent any undue generation of steam. I am thus enabled to maintain the etficiency of the apparatus, whatever may be the condition of the external temperature.

As a constant how of cold water in the tank wouldsoon till the same, and by carrying the water into the steau1-pipe cause foaming of the water, and thus impair the operation of the apparatus, I arrange the discharge-valve below the steam-pipe, so that any surplus water will flow off through the casing of the said valve upon the descent of the elevator-cage.

It will be apparent that cocks or other forms of valves may be used, and that other devices than levers may be employed for operating them.

I claim- 1. The combination, with the elevatorcylinder A, tank B, connecting-pipe a, and steampipe d, and the valves 0 e i, of the rods 1) D, both provided with tappets arranged so as to open the water-valve and afterward the steamvalve, to raise the piston, in the cylinder, and also to open the overflow-valve before the water-valve is raised to lower the piston, for the purpose set forth.

2. The combination of the steam and water tank B, communicating with the eylinder,with the overflow-pipe which regulates the water line, and a steam-pipe communicating with an extension of the tank above the water-line, substantially as described.

3. The combination, with the steam and water tank communicating with the cylinder and provided with steam and overflow valves and pipes, of pipe I, admitting cold water to the tank, for the purpose specified.

4. The combination, with the steam and water tank B, commuuicating with a steam-pipe and with an elevator-cylinder, ot' a water-inlet pipe and an overflow-pipe, substantially as and for the purpose setforth.

5. The combination, with the steam and water tank, communicating with a steam-pipe and with an elevator-cylinder, and provided with a water-inlet pipe and an overflow, of valves arranged in the steam inlet overflow, and in the pipe between the tank and cylinder, and appliances, substantially as described, for operating the valves successively, as specified.

In testimony \vhereofI have signed my name to this specification in the presence of two subscribing witnesses.

GOLDSBURY H. POND. 

